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Turning Point Mine (Rainbow claims; Monarch Mine; Golden Wonder Mine; Camino property), Tat Momoli area, Casa Grande Mining District, Slate Mts, Tohono O'odham Indian Reservation, Pinal Co., Arizona, USAi
Regional Level Types
Turning Point Mine (Rainbow claims; Monarch Mine; Golden Wonder Mine; Camino property)Mine
Tat Momoli areaArea
Casa Grande Mining DistrictMining District
Slate MtsMountain Range
Tohono O'odham Indian ReservationReservation
Pinal Co.County
ArizonaState
USACountry

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Key
Latitude & Longitude (WGS84):
32° 36' 0'' North , 111° 53' 47'' West
Latitude & Longitude (decimal):
Locality type:
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Vaiva Vo128 (2011)13.4km
Chuichu269 (2011)19.9km
Arizona City10,475 (2011)27.3km
Anegam151 (2011)28.2km
Stanfield740 (2011)32.0km


A former surface and underground Pb-Ag-Cu-Au-V-Mo-Zn mine located in sec. 36, T9S, R4E, adjoining the Jack Rabbit Mine on the W., and located about 2¾ miles W of Tat Momoli (Jackrabbit). Discovered 1898 and produced 1898-1946. Owned by O. T. Manning, E. L. Harris, & W. M. Mischer. Operators included O.T. Manning, F.C. Manning, and Bartlett McNatt. Additional names which apply to this locality: Tuba City Mining and Milling Co. property; Southern Arizona Mines Inc. property; Turning Point Aended MS 1353 patented claim; SW Desert Enterprises property; Legal Tender Amended MS 1353 patented claim; Golden Wonder Amended MS 1353 patented claim.

Mineralization is a vein deposit in a NE-striking, 65SE-dipping normal fault, hosted in Escabrosa Limestone, dipping 60E. Ore concentration was supergene enrichment. Ore control was a limestone cap as a barrier and andesite permeability. The highest grade ore was in andesite porphyry. Mineralization weakens downward. An associated rock unit is andesite

Workings include levels at 74, 154, 184, and 215 feet; surface trenching. A 10 stamp mill was built in 1902. Production included some high grade ore stoped and shipped in 1911. The mine worked intermittently until 1946. 1913 reported recovery of metals in amalgam and concentrates was about 60%. Values were $6-7/ton; sometimes over $100/ton.

The greatest potential for further production probably lies in the 600 feet of unexplored vein partially exposed NE of the shaft. The vein split junction 300 feet NE of the shaft would provide a likely target for exploration. A search for the western extension of the Turning Point vein W of the N-striking, W-dipping fault against which past operations ceased, might be profitable.

Assay data: $18/t Au and Ag in 1880-1900 (period values).

Regions containing this locality

North America PlateTectonic Plate
Sonoran Desert, North AmericaDesert
Tohono O'odham Indian Reservation, Arizona, USAReservation

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


5 valid minerals.

Detailed Mineral List:

Descloizite
Formula: PbZn(VO4)(OH)
Habit: Tiny
Colour: Red
Description: Crystals coating vanadinite.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 201.
Galena
Formula: PbS
Reference: MRDS database Dep. ID #10102392, MRDS ID #M000048.
Gold
Formula: Au
Reference: MRDS database Dep. ID #10102392, MRDS ID #M000048.
Vanadinite
Formula: Pb5(VO4)3Cl
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 201.
Willemite
Formula: Zn2SiO4
Reference: MRDS database Dep. ID #10102392, MRDS ID #M000048.

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Gold1.AA.05Au
Group 2 - Sulphides and Sulfosalts
Galena2.CD.10PbS
Group 8 - Phosphates, Arsenates and Vanadates
Descloizite8.BH.40PbZn(VO4)(OH)
Vanadinite8.BN.05Pb5(VO4)3Cl
Group 9 - Silicates
Willemite9.AA.05Zn2SiO4

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Gold1.1.1.1Au
Group 2 - SULFIDES
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
(AB)2(XO4)Zq
Descloizite41.5.2.1PbZn(VO4)(OH)
A5(XO4)3Zq
Vanadinite41.8.4.3Pb5(VO4)3Cl
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [4] coordination
Willemite51.1.1.2Zn2SiO4

List of minerals for each chemical element

HHydrogen
H DescloizitePbZn(VO4)(OH)
OOxygen
O DescloizitePbZn(VO4)(OH)
O VanadinitePb5(VO4)3Cl
O WillemiteZn2SiO4
SiSilicon
Si WillemiteZn2SiO4
SSulfur
S GalenaPbS
ClChlorine
Cl VanadinitePb5(VO4)3Cl
VVanadium
V DescloizitePbZn(VO4)(OH)
V VanadinitePb5(VO4)3Cl
ZnZinc
Zn DescloizitePbZn(VO4)(OH)
Zn WillemiteZn2SiO4
AuGold
Au GoldAu
PbLead
Pb DescloizitePbZn(VO4)(OH)
Pb VanadinitePb5(VO4)3Cl
Pb GalenaPbS

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Tenny, J.B. (1927-1929) History of Mining in Arizona, Special Cllection, University of Arizona Library & Arizona Bureau of Mines Library: 337-338.
Tenney, J.B. (1934) Economic Geological Reconnaissance of Casa Grande Mining District. Arizona Bureau of Mines: 22-23.
US Atomic Energy Commission Preliminary Reconnaissance Report 172-488 (1953): 8.
Hammer (1961) Geology and Ore Deposits of the Jackrabbit area, Pinal County, Arizona. MS thesis, University of Arizona.
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 201.
U.S. Bureau of Mines file data.
USGS 1 minute Silver Reef Mountains Quadrangle map.
U.S. Bureau of Land Management Mining District Sheet 556.
Arizona Department of Mineral Resources Turning Point file.
Arizona Department of Mineral Resources Camino Mine file.
Arizona Department of Mineral Resources Southern Arizona Mines, Inc. file.
Arizona Department of Mineral Resources Desert Queen file.
Arizona Department of Mineral Resources Jack Rabbit file.
Arizona Department of Mineral Resources U files.
MRDS database Dep. ID #10102392, MRDS ID #M000048; and Dep. ID #10162022, MAS ID #0040210845.

USGS MRDS Record:10102392
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